Flutter打印机控制插件printer_controller_pr3的使用
Flutter打印机控制插件printer_controller_pr3的使用
printer_controller_pr3
这是一个新的Flutter插件项目。
开始使用
这个Flutter插件旨在通过Honeywell Intermec打印机的Android AAR库访问其命令方法。它使纯Flutter应用程序能够访问打印机，而无需打开任何原生Android活动。
特别感谢github.com/Phincode，我在开发过程中得到了他github.com/Phincode/honnywellintermecpr3项目的很多帮助。
设置
在使用这些方法之前，有一些步骤需要执行：
重要提示
如果您想在普通Android设备上使用此插件，您应该首先加载行打印服务APK。
您可以从此处下载它。
步骤1
在您的根目录下的android文件夹中添加一个名为libs的新文件夹，并将内容放入此处提供的文件夹中。
步骤2
在android/settings.gradle文件中添加一行include ':libs'。
步骤3
更新您的应用级AndroidManifest.xml，在manifest标签中添加xmlns:tools="http://schemas.android.com/tools"，并在application标签中添加tools:replace="android:label"。
完整示例Demo
以下是完整的示例代码，展示了如何使用printer_controller_pr3插件来连接和打印信息到打印机。
import 'package:flutter/material.dart';
import 'package:printer_controller_pr3/printer_controller_pr3.dart';
import 'package:printer_controller_pr3_example/constants.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Printer Controller Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Printer Controller Example'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final TextEditingController _writeController = TextEditingController();
final _printerControllerPr3Plugin = PrinterControllerPr3();
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: SingleChildScrollView(
child: SizedBox(
width: MediaQuery.of(context).size.width,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
const _Divider(),
SizedBox(
height: MediaQuery.of(context).size.height * 0.01,
),
const _Divider(),
Container(
height: MediaQuery.of(context).size.height / 9,
width: MediaQuery.of(context).size.width,
color: Colors.lightBlueAccent.shade100,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Text("Match device on bluetooth settings then connect"),
ElevatedButton(
onPressed: () async {
final a = await _printerControllerPr3Plugin.createPrinter(
printerName: Constants.deviceName,
printerAddress: Constants.deviceAddress,
);
print('THIS IS RESULT -- $a');
},
child: const Text('Connect'),
),
],
),
),
const SizedBox(
height: 10,
),
const _Divider(),
ElevatedButton(
onPressed: () {
//CreatePrinter(Constants.deviceName, "bt://00:1D:DF:58:0D:3D");
_printerControllerPr3Plugin.newLine(4);
_printerControllerPr3Plugin.writeGraphicBase64(Constants.graphic64Code, 0, 180, 220, 70);
_printerControllerPr3Plugin.newLine(1);
_printerControllerPr3Plugin.write(" Train Ticket ");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.setBold(true);
_printerControllerPr3Plugin.write("Trip No : TrainID");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("Journey Name : Station name - Landing station name");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("PassengerID : PenaltyID");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("PassengerName : Username");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("PenaltyDate: Time-TrainID");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("PenaltyType: PenaltyReason");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("PenaltyAmount: X TL");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("Description: Penalty Description");
_printerControllerPr3Plugin.newLine(2);
_printerControllerPr3Plugin.write("Issued By: " "IssuedByXXX");
_printerControllerPr3Plugin.newLine(3);
_printerControllerPr3Plugin.newLine(4);
},
child: const Text("Print Ticket")),
const _Divider(),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.newLine(3);
},
child: const Text("Add New Line")),
const _Divider(),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.writeGraphicBase64(
// PRINT IMAGE FUNCTION
Constants.graphic64Code, //BASE64 CODE OF THE IMAGE
0, // ROTATION DEGREE MUST BE 0,90,180 OR 270
180, // OFFSET FROM THE LEFT HAND SIDE OF THE PAGE
220, // GRAPHIC WIDTH
250 // GRAPHIC HEIGHT
);
},
child: const Text("Write Graphic Base 64")),
const _Divider(),
const SizedBox(
height: 10,
),
Row(
children: [
Container(
padding: const EdgeInsets.symmetric(horizontal: 15),
width: MediaQuery.of(context).size.width * 0.80,
child: TextFormField(
controller: _writeController,
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please enter text';
}
return null;
},
onChanged: (String text) {},
decoration: const InputDecoration(
hintText: 'Enter text to print..',
),
),
),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.write(_writeController.text);
_printerControllerPr3Plugin.newLine(2);
},
child: const Text("Write")),
],
),
const SizedBox(height: 10),
const _Divider(),
SizedBox(
width: MediaQuery.of(context).size.width,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Expanded(flex: 1, child: Center(child: Text("Set Bold"))),
Expanded(
flex: 1,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setBold(true);
},
child: const Text("Yes")),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setBold(false);
},
child: const Text("No")),
],
),
),
],
),
),
const _Divider(),
SizedBox(
width: MediaQuery.of(context).size.width,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Expanded(flex: 1, child: Center(child: Text("Set Compress"))),
Expanded(
flex: 1,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setCompress(true);
},
child: const Text("Yes")),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setCompress(false);
},
child: const Text("No")),
],
),
),
],
),
),
const _Divider(),
const _Divider(),
SizedBox(
width: MediaQuery.of(context).size.width,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Expanded(flex: 1, child: Center(child: Text("Set DoubleHigh"))),
Expanded(
flex: 1,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setDoubleHigh(true);
},
child: const Text("Yes")),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setDoubleHigh(false);
},
child: const Text("No")),
],
),
),
],
),
),
const _Divider(),
SizedBox(
width: MediaQuery.of(context).size.width,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Expanded(flex: 1, child: Center(child: Text("Set DoubleWide"))),
Expanded(
flex: 1,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setDoubleWide(true);
},
child: const Text("Yes")),
ElevatedButton(
onPressed: () {
_printerControllerPr3Plugin.setDoubleWide(false);
},
child: const Text("No")),
],
),
),
],
),
),
const _Divider(),
const SizedBox(
height: 20,
),
ElevatedButton(
onPressed: () => _printerControllerPr3Plugin.disconnect(),
child: const Text("Disconnect"),
),
const _Divider(),
ElevatedButton(
onPressed: () => _printerControllerPr3Plugin.close(),
child: const Text("Close"),
),
const _Divider(),
ElevatedButton(
onPressed: () async => print(await _printerControllerPr3Plugin.isConnected()),
child: const Text("Is Connected?"),
),
],
),
),
),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class _Divider extends StatelessWidget {
const _Divider();
[@override](/user/override)
Widget build(BuildContext context) {
return const Divider(
thickness: 3,
indent: 10,
endIndent: 10,
);
}
}
更多关于Flutter打印机控制插件printer_controller_pr3的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
